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1 |
1 | <?php |
2 | /** |
3 | * @private |
4 | */ |
5 | class Less_Environment { |
6 | |
7 | /** |
8 | * Information about the current file - for error reporting and importing and making urls relative etc. |
9 | * |
10 | * - rootpath: rootpath to append to URLs |
11 | * |
12 | * @var array|null |
13 | */ |
14 | public $currentFileInfo; |
15 | |
16 | /** @var bool Whether we are currently importing multiple copies */ |
17 | public $importMultiple = false; |
18 | |
19 | /** |
20 | * @var array |
21 | */ |
22 | public $frames = []; |
23 | /** @var array */ |
24 | public $importantScope = []; |
25 | public $inCalc = false; |
26 | public $mathOn = true; |
27 | |
28 | /** @var Less_Tree_Media[] */ |
29 | public $mediaBlocks = []; |
30 | /** @var Less_Tree_Media[] */ |
31 | public $mediaPath = []; |
32 | |
33 | /** @var string[] */ |
34 | public $imports = []; |
35 | |
36 | /** |
37 | * This is the equivalent of `importVisitor.onceFileDetectionMap` |
38 | * as used by the dynamic `importNode.skip` function. |
39 | * |
40 | * @see less-2.5.3.js#ImportVisitor.prototype.onImported |
41 | * @var array<string,true> |
42 | */ |
43 | public $importVisitorOnceMap = []; |
44 | |
45 | public static $tabLevel = 0; |
46 | |
47 | public static $lastRule = false; |
48 | |
49 | public static $_noSpaceCombinators; |
50 | |
51 | public static $mixin_stack = 0; |
52 | |
53 | public $math = self::MATH_PARENS_DIVISION; |
54 | |
55 | public $importCallback = null; |
56 | |
57 | public $parensStack = []; |
58 | |
59 | public const MATH_ALWAYS = 0; |
60 | public const MATH_PARENS_DIVISION = 1; |
61 | public const MATH_PARENS = 2; |
62 | |
63 | /** |
64 | * @var array |
65 | */ |
66 | public $functions = []; |
67 | |
68 | public function Init() { |
69 | self::$tabLevel = 0; |
70 | self::$lastRule = false; |
71 | self::$mixin_stack = 0; |
72 | |
73 | self::$_noSpaceCombinators = [ |
74 | '' => true, |
75 | ' ' => true, |
76 | '|' => true |
77 | ]; |
78 | } |
79 | |
80 | /** |
81 | * @param string $file |
82 | * @return void |
83 | */ |
84 | public function addParsedFile( $file ) { |
85 | $this->imports[] = $file; |
86 | } |
87 | |
88 | public function clone() { |
89 | $new_env = clone $this; |
90 | // NOTE: Match JavaScript by-ref behaviour for arrays |
91 | $new_env->imports =& $this->imports; |
92 | $new_env->importVisitorOnceMap =& $this->importVisitorOnceMap; |
93 | return $new_env; |
94 | } |
95 | |
96 | /** |
97 | * @param string $file |
98 | * @return bool |
99 | */ |
100 | public function isFileParsed( $file ) { |
101 | return in_array( $file, $this->imports ); |
102 | } |
103 | |
104 | public function copyEvalEnv( $frames = [] ) { |
105 | $new_env = new self(); |
106 | $new_env->frames = $frames; |
107 | $new_env->importantScope = $this->importantScope; |
108 | $new_env->math = $this->math; |
109 | return $new_env; |
110 | } |
111 | |
112 | /** |
113 | * @return bool |
114 | * @see less-3.13.1.js#Eval.prototype.isMathOn |
115 | */ |
116 | public function isMathOn( $op = "" ) { |
117 | if ( !$this->mathOn ) { |
118 | return false; |
119 | } |
120 | if ( $op === '/' && $this->math !== $this::MATH_ALWAYS && !$this->parensStack ) { |
121 | return false; |
122 | } |
123 | |
124 | if ( $this->math > $this::MATH_PARENS_DIVISION ) { |
125 | return (bool)$this->parensStack; |
126 | } |
127 | return true; |
128 | } |
129 | |
130 | /** |
131 | * @see less-3.13.1.js#Eval.prototype.inParenthesis |
132 | */ |
133 | public function inParenthesis() { |
134 | // Optimization: We don't need undefined/null, always have an array |
135 | $this->parensStack[] = true; |
136 | } |
137 | |
138 | /** |
139 | * @see less-3.13.1.js#Eval.prototype.inParenthesis |
140 | */ |
141 | public function outOfParenthesis() { |
142 | array_pop( $this->parensStack ); |
143 | } |
144 | |
145 | /** |
146 | * @param string $path |
147 | * @return bool |
148 | * @see less-2.5.3.js#Eval.isPathRelative |
149 | */ |
150 | public static function isPathRelative( $path ) { |
151 | return !preg_match( '/^(?:[a-z-]+:|\/|#)/', $path ); |
152 | } |
153 | |
154 | /** |
155 | * Canonicalize a path by resolving references to '/./', '/../' |
156 | * Does not remove leading "../" |
157 | * @param string $path or url |
158 | * @return string Canonicalized path |
159 | */ |
160 | public static function normalizePath( $path ) { |
161 | $segments = explode( '/', $path ); |
162 | $segments = array_reverse( $segments ); |
163 | |
164 | $path = []; |
165 | $path_len = 0; |
166 | |
167 | while ( $segments ) { |
168 | $segment = array_pop( $segments ); |
169 | switch ( $segment ) { |
170 | |
171 | case '.': |
172 | break; |
173 | |
174 | case '..': |
175 | // @phan-suppress-next-line PhanTypeInvalidDimOffset False positive |
176 | if ( !$path_len || ( $path[$path_len - 1] === '..' ) ) { |
177 | $path[] = $segment; |
178 | $path_len++; |
179 | } else { |
180 | array_pop( $path ); |
181 | $path_len--; |
182 | } |
183 | break; |
184 | |
185 | default: |
186 | $path[] = $segment; |
187 | $path_len++; |
188 | break; |
189 | } |
190 | } |
191 | |
192 | return implode( '/', $path ); |
193 | } |
194 | |
195 | public function unshiftFrame( $frame ) { |
196 | array_unshift( $this->frames, $frame ); |
197 | } |
198 | |
199 | public function shiftFrame() { |
200 | return array_shift( $this->frames ); |
201 | } |
202 | |
203 | } |